xsm support for restrictive policy and dynamic modification

xsm support for restrictive policy and dynamic modification

[anshul makkar]

Hi,

In Xen-Summit, Toronto, I did a presentation on XSM where two 
shortcomings with the present implementation were highlighted:

1) Allow more finer grain control. e.g all introspection domain doesn't 
need to have pci-passthrough capability while few need to have and all 
should have introspection capability.

2) Need for dynamic modification, loading/unloading of the policy.

In response to the above I got few suggestion from the community (Thanks 
Daniel De Graf and Stephen Smalley and others) and after researching the 
alternatives I found that already existent XSM support for MCS and MLS 
and type bound can fit in for finer grain control.

Regarding dynamic support, its something that is still desired and not 
implemented. Stephan shared few links related to these:

this:http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.129.7129&rep=rep1&type=pdf

http://oss.tresys.com/archive/policy-server.php

Going forward, I will be focusing towards dynamic implementation as I 
believe currently existing infrastructure is sufficient enough to 
provide finer level of control over domains.

Thanks
Anshul

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